4299711473
UUIDs are not portable.
o Move mkimg_uuid() to a new file and merge both gpt_uuid_enc()
and vhd_uuid_enc() into a single mkimg_uuid_enc() that lives
in the same file.
o Move the OS-specific implementation of generating a UUID to
osdep_uuidgen() and provide the implementations for FreeBSD,
macOS and Linux.
o Expect the partitioning scheme headers to be found by having
a search to the directory in which the headers live. This
avoids conflicts on non-FreeBSD machines.
126 lines
3.1 KiB
C
126 lines
3.1 KiB
C
/*-
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* Copyright (c) 2016 Marcel Moolenaar
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#include <sys/cdefs.h>
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__FBSDID("$FreeBSD$");
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#include <stdint.h>
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#include <stdio.h>
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#include <string.h>
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#include "endian.h"
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#include "image.h"
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#include "mkimg.h"
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static void osdep_uuidgen(mkimg_uuid_t *);
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#ifdef __APPLE__
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#include <uuid/uuid.h>
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static void
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osdep_uuidgen(mkimg_uuid_t *uuid)
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{
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uuid_generate_time((void *)uuid);
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}
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#endif /* __APPLE__ */
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#ifdef __FreeBSD__
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#include <sys/uuid.h>
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static void
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osdep_uuidgen(mkimg_uuid_t *uuid)
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{
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uuidgen((void *)uuid, 1);
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}
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#endif /* __FreeBSD__ */
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#ifdef __linux__
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#include <stdlib.h>
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#include <time.h>
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static void
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osdep_uuidgen(mkimg_uuid_t *uuid)
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{
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struct timespec tp;
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uint64_t time = 0x01B21DD213814000LL;
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u_int i;
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uint16_t seq;
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if (clock_gettime(CLOCK_REALTIME, &tp) == -1)
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abort();
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time += (uint64_t)tp.tv_sec * 10000000LL;
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time += tp.tv_nsec / 100;
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uuid->time_low = (uint32_t)time;
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uuid->time_mid = (uint16_t)(time >> 32);
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uuid->time_hi_and_version = (uint16_t)(time >> 48) & 0xfff;
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uuid->time_hi_and_version |= 1 << 12;
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seq = random();
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uuid->clock_seq_hi_and_reserved = (uint8_t)(seq >> 8) & 0x3f;
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uuid->clock_seq_low = (uint8_t)seq;
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for (i = 0; i < 6; i++)
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uuid->node[i] = (uint8_t)random();
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uuid->node[0] |= 0x01;
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}
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#endif /* __linux__ */
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void
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mkimg_uuid(mkimg_uuid_t *uuid)
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{
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static uint8_t gen[sizeof(mkimg_uuid_t)];
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u_int i;
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if (!unit_testing) {
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osdep_uuidgen(uuid);
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return;
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}
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for (i = 0; i < sizeof(gen); i++)
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gen[i]++;
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memcpy(uuid, gen, sizeof(*uuid));
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}
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void
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mkimg_uuid_enc(void *buf, const mkimg_uuid_t *uuid)
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{
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uint8_t *p = buf;
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u_int i;
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le32enc(p, uuid->time_low);
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le16enc(p + 4, uuid->time_mid);
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le16enc(p + 6, uuid->time_hi_and_version);
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p[8] = uuid->clock_seq_hi_and_reserved;
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p[9] = uuid->clock_seq_low;
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for (i = 0; i < 6; i++)
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p[10 + i] = uuid->node[i];
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}
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